package com.atguigu.lease.common.utils;

import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import io.jsonwebtoken.*;
import io.jsonwebtoken.security.Keys;

import javax.crypto.SecretKey;
import java.util.Date;

public class JwtUtil {



    private static SecretKey tokenSignKey = Keys.hmacShaKeyFor("M0PKKI6pYGVWWfDZw90a0lTpGYX1d4AQ".getBytes());

    public static String createToken(Long userId, String username) {
        String token = Jwts.builder().
                setSubject("USER_INFO").
                setExpiration(new Date(System.currentTimeMillis() + 3600000)).
                claim("userId", userId).
                claim("username", username).
                signWith(tokenSignKey).
                compact();
        return token;
    }

    /**
     * 校验token 是否合法
     * @param token
     * @return
     */
    public static Claims parseToken(String token){
        if (token==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        }

        try{
            JwtParser jwtParser = Jwts.parserBuilder().setSigningKey(tokenSignKey).build();
            return jwtParser.parseClaimsJws(token).getBody();
        }catch (ExpiredJwtException e){
            throw new LeaseException(ResultCodeEnum.TOKEN_EXPIRED);
        }catch (JwtException e){
            throw new LeaseException(ResultCodeEnum.TOKEN_INVALID);
        }
    }

    //access-token
    // eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJVU0VSX0lORk8iLCJleHAiOjE3NjI4NzY5MDUsInVzZXJJZCI6MiwidXNlcm5hbWUiOiJ1c2VyIn0.WCBjwkxmDMTE4P0zwsOx2kK5ATa1ZLlYsNlam4csxI8
    public static void main(String[] args) {
        System.out.println(createToken(2L, "user"));
    }
}